MultipleExpriation implementation
This is a direct lift of the changes from !185 (merged), applied to master rather than the MonteCarlo branch. It was merged there in !184 (merged), and is unchanged and directly comparable.
cc @nimounet
This is a direct lift of the changes from !185 (merged), applied to master rather than the MonteCarlo branch. It was merged there in !184 (merged), and is unchanged and directly comparable.
cc @nimounet